Students and staff waited outside for approximately an hour as police searched the school.

"During that time officers were able to begin an investigation into who the culprit might be," Engler said.

Engler said the school had received a bomb threat the day before as well, but chose not to take action.

"It raises concerns that this occurred two days in a row," Engler said.

Police are continuing the investigation and said they have a strong lead in the case.

"We are continuing to work leads," Engler said. "We are waiting to interview a person that we believe may have some involvement in the case."

"Several years ago we had a similar problem and we were able to successfully complete an investigation and made several arrests," Engler said. "We are hoping to go that same direction because it is taken seriously and it is illegal and we will do everything we can to find and prosecute this person."